>Have you seen this?
>
>http://www.codeproject.com/aspnet/I3HTree2.asp
>
>It looks promising.
>
>We actually used an ASP/PHP tool by CityBusinessLogic. I really liked it. I figured asp.net would have more options (being newer and all).

I looked at some datagrid and repeater extensions on codeproject, but didn't find anything that particularly helped. The example you note seems to be strictly tree based, which isn't the interface I'll need to match, but it looks interesting for other purposes.